/*

 * Fuel UX Spinner

 * https://github.com/ExactTarget/fuelux

 *

 * Copyright (c) 2012 ExactTarget

 * Licensed under the MIT license.

 */


(function($ , undefined) {


	//var $ = require('jquery');



	// SPINNER CONSTRUCTOR AND PROTOTYPE


	var Spinner = function (element, options) {

		this.$element = $(element);

		this.options = $.extend({}, $.fn.spinner.defaults, options);

		this.$input = this.$element.find('.spinner-input');

		this.$element.on('keyup', this.$input, $.proxy(this.change, this));


		if (this.options.hold) {

			this.$element.on('mousedown', '.spinner-up', $.proxy(function() { this.startSpin(true); } , this));

			this.$element.on('mouseup', '.spinner-up, .spinner-down', $.proxy(this.stopSpin, this));

			this.$element.on('mouseout', '.spinner-up, .spinner-down', $.proxy(this.stopSpin, this));

			this.$element.on('mousedown', '.spinner-down', $.proxy(function() {this.startSpin(false);} , this));

		} else {

			this.$element.on('click', '.spinner-up', $.proxy(function() { this.step(true); } , this));

			this.$element.on('click', '.spinner-down', $.proxy(function() { this.step(false); }, this));

		}


		this.switches = {

			count: 1,

			enabled: true

		};


		if (this.options.speed === 'medium') {

			this.switches.speed = 300;

		} else if (this.options.speed === 'fast') {

			this.switches.speed = 100;

		} else {

			this.switches.speed = 500;

		}


		this.lastValue = null;


		this.render();


		if (this.options.disabled) {

			this.disable();

		}

	};


	Spinner.prototype = {

		constructor: Spinner,


		render: function () {

			this.$input.val(this.options.value);

			this.$input.attr('maxlength',(this.options.max + '').split('').length);

		},


		change: function () {

			var newVal = this.$input.val();


			if(newVal/1){

				this.options.value = newVal/1;

			}else{

				newVal = newVal.replace(/[^0-9]/g,'');

				this.$input.val(newVal);

				this.options.value = newVal/1;

			}


			this.triggerChangedEvent();

		},


		stopSpin: function () {

			clearTimeout(this.switches.timeout);

			this.switches.count = 1;

			this.triggerChangedEvent();

		},


		triggerChangedEvent: function () {

			var currentValue = this.value();

			if (currentValue === this.lastValue) return;


			this.lastValue = currentValue;


			// Primary changed event

			this.$element.trigger('changed', currentValue);


			// Undocumented, kept for backward compatibility

			this.$element.trigger('change');

		},


		startSpin: function (type) {


			if (!this.options.disabled) {

				var divisor = this.switches.count;


				if (divisor === 1) {

					this.step(type);

					divisor = 1;

				} else if (divisor < 3){

					divisor = 1.5;

				} else if (divisor < 8){

					divisor = 2.5;

				} else {

					divisor = 4;

				}


				this.switches.timeout = setTimeout($.proxy(function() {this.iterator(type);} ,this),this.switches.speed/divisor);

				this.switches.count++;

			}

		},


		iterator: function (type) {

			this.step(type);

			this.startSpin(type);

		},


		step: function (dir) {

			var curValue = this.options.value;

			var limValue = dir ? this.options.max : this.options.min;


			if ((dir ? curValue < limValue : curValue > limValue)) {

				var newVal = curValue + (dir ? 1 : -1) * this.options.step;


				if (dir ? newVal > limValue : newVal < limValue) {

					this.value(limValue);

				} else {

					this.value(newVal);

				}

			}

		},


		value: function (value) {

			if (!isNaN(parseFloat(value)) && isFinite(value)) {

				value = parseFloat(value);

				this.options.value = value;

				this.$input.val(value);

				return this;

			} else {

				return this.options.value;

			}

		},


		disable: function () {

			this.options.disabled = true;

			this.$input.attr('disabled','');

			this.$element.find('.btn').addClass('disabled');

		},


		enable: function () {

			this.options.disabled = false;

			this.$input.removeAttr("disabled");

			this.$element.find('.btn').removeClass('disabled');

		}

	};



	// SPINNER PLUGIN DEFINITION


	$.fn.spinner = function (option,value) {

		var methodReturn;


		var $set = this.each(function () {

			var $this = $(this);

			var data = $this.data('spinner');

			var options = typeof option === 'object' && option;


			if (!data) $this.data('spinner', (data = new Spinner(this, options)));

			if (typeof option === 'string') methodReturn = data[option](value);

		});


		return (methodReturn === undefined) ? $set : methodReturn;

	};


	$.fn.spinner.defaults = {

		value: 1,

		min: 1,

		max: 999,

		step: 1,

		hold: true,

		speed: 'medium',

		disabled: false

	};


	$.fn.spinner.Constructor = Spinner;



	// SPINNER DATA-API


	$(function () {

		$('body').on('mousedown.spinner.data-api', '.spinner', function (e) {

			var $this = $(this);

			if ($this.data('spinner')) return;

			$this.spinner($this.data());

		});

	});


})(jQuery);

